Here's another review for Global only this time their customer service.
I had a problem with my 3 ish year old Energiser wheel kit and contacted Global for assistance. They told me to send it to them for check and repair. Eight days later I have it back with a new controller box and working perfectly. These wheel companies seem to get some stick recently but with service like this I would recommend them to anyone.

Was it free or did they charge you ?

In reply to Post #2
I have asked them how much I owe as they have not included a bill just a hand written note so I am unsure but it seems maybe not.